London to New York Time Difference

London to New York Time Difference — Live Calculator & Conversion Table

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Time Difference Table

Location 1	Location 2

London (GMT/BST) is 5 hours ahead of New York (EST/EDT) almost all year. Both cities observe DST — and since both shift together, the gap stays at 5h in both winter and summer. The only exception is a ~3-week window in mid-March (US springs forward before UK) and ~1 week in late October (UK falls back before US), where the gap is temporarily 4 hours.

Typical difference

+5h

Year-round (almost always)

Transition gap

+4h

Mid-Mar & late Oct only

London timezone

GMT / BST

UTC+0 / UTC+1

New York timezone

EST / EDT

UTC−5 / UTC−4

Best Times to Schedule a Meeting

With a consistent 5h gap, the best meeting window is 14:00–17:00 London time (09:00–12:00 New York) — London afternoon aligns with New York morning.

London time	New York time	Season	Suitability
13:00 – 14:00	08:00–09:00	All seasons	OK
14:00 – 17:00	09:00–12:00	All seasons	Best window
17:00 – 18:00	12:00–13:00	All seasons	OK

Time Difference by Month

Highlighted months indicate when a DST transition changes the difference.

Jan

Feb

Mar

4–5h

Apr

May

Jun

Jul

Aug

Sep

Oct

4–5h

Nov

Dec

Daylight Saving Time Schedule

Both cities observe DST but switch on different dates. The US switches the second Sunday of March; the UK switches the last Sunday of March. This creates two short transition windows each year.

Event	London	New York	Effect
Spring forward	Last Sunday of March, 01:00	Second Sunday of March, 02:00	~3 weeks in Mar: 4h
Fall back	Last Sunday of October, 02:00	First Sunday of November, 02:00	~1 week Oct/Nov: 4h

Frequently Asked Questions

How many hours ahead is London compared to New York?

London is 5 hours ahead of New York almost all year — both in winter (GMT vs EST) and in summer (BST vs EDT), since both cities observe DST together. The gap is temporarily 4 hours for ~3 weeks in mid-March and ~1 week in late October.

What time is it in New York when it is noon in London?

When it is 12:00 noon in London, it is 07:00 in New York — almost all year. The answer is 08:00 only during the brief mid-March and late October transition windows.

What is the best time to call New York from London?

The best window is 14:00–17:00 London time (09:00–12:00 New York). This 3-hour window works all year.

Is New York always 5 hours behind London?

Almost always. The only exceptions are ~3 weeks in mid-March and ~1 week in late October, when the gap is temporarily 4 hours.

When does the London–New York time difference change?

Twice a year: when the US springs forward in mid-March and when the UK falls back in late October (with the US following ~1 week later).

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